#include "lcrypt.h"
#include <inttypes.h>

/* CRC32 TAB */
static uint32_t CRC32[] = {
 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL,
 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L,
 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L,
 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L,
 0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL,
 0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L,
 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L,
 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L,
 0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L,
 0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L,
 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL,
 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL,
 0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL,
 0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L,
 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L,
 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL,
 0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L,
 0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL,
 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L,
 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL,
 0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L,
 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
 0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L,
 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L,
 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
 0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL,
 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
 0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL,
 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL,
 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L,
 0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL,
 0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L,
 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L,
 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL,
 0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L,
 0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL,
 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL,
 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L,
 0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L,
 0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL,
 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L,
 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L,
 0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L,
 0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL,
 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L,
 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L,
 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL,
 0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L,
 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL
};

/* CRC64 TAB */
static uint64_t CRC64[] = {
    0x0000000000000000, 0x7ad870c830358979,
    0xf5b0e190606b12f2, 0x8f689158505e9b8b,
    0xc038e5739841b68f, 0xbae095bba8743ff6,
    0x358804e3f82aa47d, 0x4f50742bc81f2d04,
    0xab28ecb46814fe75, 0xd1f09c7c5821770c,
    0x5e980d24087fec87, 0x24407dec384a65fe,
    0x6b1009c7f05548fa, 0x11c8790fc060c183,
    0x9ea0e857903e5a08, 0xe478989fa00bd371,
    0x7d08ff3b88be6f81, 0x07d08ff3b88be6f8,
    0x88b81eabe8d57d73, 0xf2606e63d8e0f40a,
    0xbd301a4810ffd90e, 0xc7e86a8020ca5077,
    0x4880fbd87094cbfc, 0x32588b1040a14285,
    0xd620138fe0aa91f4, 0xacf86347d09f188d,
    0x2390f21f80c18306, 0x594882d7b0f40a7f,
    0x1618f6fc78eb277b, 0x6cc0863448deae02,
    0xe3a8176c18803589, 0x997067a428b5bcf0,
    0xfa11fe77117cdf02, 0x80c98ebf2149567b,
    0x0fa11fe77117cdf0, 0x75796f2f41224489,
    0x3a291b04893d698d, 0x40f16bccb908e0f4,
    0xcf99fa94e9567b7f, 0xb5418a5cd963f206,
    0x513912c379682177, 0x2be1620b495da80e,
    0xa489f35319033385, 0xde51839b2936bafc,
    0x9101f7b0e12997f8, 0xebd98778d11c1e81,
    0x64b116208142850a, 0x1e6966e8b1770c73,
    0x8719014c99c2b083, 0xfdc17184a9f739fa,
    0x72a9e0dcf9a9a271, 0x08719014c99c2b08,
    0x4721e43f0183060c, 0x3df994f731b68f75,
    0xb29105af61e814fe, 0xc849756751dd9d87,
    0x2c31edf8f1d64ef6, 0x56e99d30c1e3c78f,
    0xd9810c6891bd5c04, 0xa3597ca0a188d57d,
    0xec09088b6997f879, 0x96d1784359a27100,
    0x19b9e91b09fcea8b, 0x636199d339c963f2,
    0xdf7adabd7a6e2d6f, 0xa5a2aa754a5ba416,
    0x2aca3b2d1a053f9d, 0x50124be52a30b6e4,
    0x1f423fcee22f9be0, 0x659a4f06d21a1299,
    0xeaf2de5e82448912, 0x902aae96b271006b,
    0x74523609127ad31a, 0x0e8a46c1224f5a63,
    0x81e2d7997211c1e8, 0xfb3aa75142244891,
    0xb46ad37a8a3b6595, 0xceb2a3b2ba0eecec,
    0x41da32eaea507767, 0x3b024222da65fe1e,
    0xa2722586f2d042ee, 0xd8aa554ec2e5cb97,
    0x57c2c41692bb501c, 0x2d1ab4dea28ed965,
    0x624ac0f56a91f461, 0x1892b03d5aa47d18,
    0x97fa21650afae693, 0xed2251ad3acf6fea,
    0x095ac9329ac4bc9b, 0x7382b9faaaf135e2,
    0xfcea28a2faafae69, 0x8632586aca9a2710,
    0xc9622c4102850a14, 0xb3ba5c8932b0836d,
    0x3cd2cdd162ee18e6, 0x460abd1952db919f,
    0x256b24ca6b12f26d, 0x5fb354025b277b14,
    0xd0dbc55a0b79e09f, 0xaa03b5923b4c69e6,
    0xe553c1b9f35344e2, 0x9f8bb171c366cd9b,
    0x10e3202993385610, 0x6a3b50e1a30ddf69,
    0x8e43c87e03060c18, 0xf49bb8b633338561,
    0x7bf329ee636d1eea, 0x012b592653589793,
    0x4e7b2d0d9b47ba97, 0x34a35dc5ab7233ee,
    0xbbcbcc9dfb2ca865, 0xc113bc55cb19211c,
    0x5863dbf1e3ac9dec, 0x22bbab39d3991495,
    0xadd33a6183c78f1e, 0xd70b4aa9b3f20667,
    0x985b3e827bed2b63, 0xe2834e4a4bd8a21a,
    0x6debdf121b863991, 0x1733afda2bb3b0e8,
    0xf34b37458bb86399, 0x8993478dbb8deae0,
    0x06fbd6d5ebd3716b, 0x7c23a61ddbe6f812,
    0x3373d23613f9d516, 0x49aba2fe23cc5c6f,
    0xc6c333a67392c7e4, 0xbc1b436e43a74e9d,
    0x95ac9329ac4bc9b5, 0xef74e3e19c7e40cc,
    0x601c72b9cc20db47, 0x1ac40271fc15523e,
    0x5594765a340a7f3a, 0x2f4c0692043ff643,
    0xa02497ca54616dc8, 0xdafce7026454e4b1,
    0x3e847f9dc45f37c0, 0x445c0f55f46abeb9,
    0xcb349e0da4342532, 0xb1eceec59401ac4b,
    0xfebc9aee5c1e814f, 0x8464ea266c2b0836,
    0x0b0c7b7e3c7593bd, 0x71d40bb60c401ac4,
    0xe8a46c1224f5a634, 0x927c1cda14c02f4d,
    0x1d148d82449eb4c6, 0x67ccfd4a74ab3dbf,
    0x289c8961bcb410bb, 0x5244f9a98c8199c2,
    0xdd2c68f1dcdf0249, 0xa7f41839ecea8b30,
    0x438c80a64ce15841, 0x3954f06e7cd4d138,
    0xb63c61362c8a4ab3, 0xcce411fe1cbfc3ca,
    0x83b465d5d4a0eece, 0xf96c151de49567b7,
    0x76048445b4cbfc3c, 0x0cdcf48d84fe7545,
    0x6fbd6d5ebd3716b7, 0x15651d968d029fce,
    0x9a0d8ccedd5c0445, 0xe0d5fc06ed698d3c,
    0xaf85882d2576a038, 0xd55df8e515432941,
    0x5a3569bd451db2ca, 0x20ed197575283bb3,
    0xc49581ead523e8c2, 0xbe4df122e51661bb,
    0x3125607ab548fa30, 0x4bfd10b2857d7349,
    0x04ad64994d625e4d, 0x7e7514517d57d734,
    0xf11d85092d094cbf, 0x8bc5f5c11d3cc5c6,
    0x12b5926535897936, 0x686de2ad05bcf04f,
    0xe70573f555e26bc4, 0x9ddd033d65d7e2bd,
    0xd28d7716adc8cfb9, 0xa85507de9dfd46c0,
    0x273d9686cda3dd4b, 0x5de5e64efd965432,
    0xb99d7ed15d9d8743, 0xc3450e196da80e3a,
    0x4c2d9f413df695b1, 0x36f5ef890dc31cc8,
    0x79a59ba2c5dc31cc, 0x037deb6af5e9b8b5,
    0x8c157a32a5b7233e, 0xf6cd0afa9582aa47,
    0x4ad64994d625e4da, 0x300e395ce6106da3,
    0xbf66a804b64ef628, 0xc5bed8cc867b7f51,
    0x8aeeace74e645255, 0xf036dc2f7e51db2c,
    0x7f5e4d772e0f40a7, 0x05863dbf1e3ac9de,
    0xe1fea520be311aaf, 0x9b26d5e88e0493d6,
    0x144e44b0de5a085d, 0x6e963478ee6f8124,
    0x21c640532670ac20, 0x5b1e309b16452559,
    0xd476a1c3461bbed2, 0xaeaed10b762e37ab,
    0x37deb6af5e9b8b5b, 0x4d06c6676eae0222,
    0xc26e573f3ef099a9, 0xb8b627f70ec510d0,
    0xf7e653dcc6da3dd4, 0x8d3e2314f6efb4ad,
    0x0256b24ca6b12f26, 0x788ec2849684a65f,
    0x9cf65a1b368f752e, 0xe62e2ad306bafc57,
    0x6946bb8b56e467dc, 0x139ecb4366d1eea5,
    0x5ccebf68aecec3a1, 0x2616cfa09efb4ad8,
    0xa97e5ef8cea5d153, 0xd3a62e30fe90582a,
    0xb0c7b7e3c7593bd8, 0xca1fc72bf76cb2a1,
    0x45775673a732292a, 0x3faf26bb9707a053,
    0x70ff52905f188d57, 0x0a2722586f2d042e,
    0x854fb3003f739fa5, 0xff97c3c80f4616dc,
    0x1bef5b57af4dc5ad, 0x61372b9f9f784cd4,
    0xee5fbac7cf26d75f, 0x9487ca0fff135e26,
    0xdbd7be24370c7322, 0xa10fceec0739fa5b,
    0x2e675fb4576761d0, 0x54bf2f7c6752e8a9,
    0xcdcf48d84fe75459, 0xb71738107fd2dd20,
    0x387fa9482f8c46ab, 0x42a7d9801fb9cfd2,
    0x0df7adabd7a6e2d6, 0x772fdd63e7936baf,
    0xf8474c3bb7cdf024, 0x829f3cf387f8795d,
    0x66e7a46c27f3aa2c, 0x1c3fd4a417c62355,
    0x935745fc4798b8de, 0xe98f353477ad31a7,
    0xa6df411fbfb21ca3, 0xdc0731d78f8795da,
    0x536fa08fdfd90e51, 0x29b7d047efec8728,
};

int lcrc32(lua_State *L){
  size_t len = 0;
  const char *str = luaL_checklstring(L, 1, &len);
  if (!str || len < 1)
    return luaL_error(L, "invalid string.");

  uint32_t i;
  uint32_t crc = 0xFFFFFFFF;

  for (i = 0; i < len; i++) crc = CRC32[ (crc ^ str[i]) & 0xff ] ^ (crc >> 8);
  lua_pushinteger(L, crc ^ 0xFFFFFFFF);
  return 1;
};

int lcrc64(lua_State *L){
  size_t len = 0;
  const char *str = luaL_checklstring(L, 1, &len);
  if (!str || len < 1)
    return luaL_error(L, "invalid string.");

  uint32_t i;
  uint64_t crc = 0x0;
  for (i = 0; i < len; i++)
    crc = CRC64[(uint8_t)crc ^ (uint8_t)str[i]] ^ (crc >> 8);

  char* buf = (char*)lua_newuserdata(L, 20);
  memset(buf, 0x0, 20);
  sprintf(buf, "%"PRIu64"", crc);

  lua_pushlstring(L, (const char*)buf, 20);
  return 1;
};
